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# extract.awk --- extract files and run programs from Texinfo files
#
# Arnold Robbins, arnold@skeeve.com, Public Domain
# May 1993
# Revised September 2000
BEGIN { IGNORECASE = 1 }
/^@c(omment)?[ \t]+system/ {
if (NF < 3) {
e = ("extract: " FILENAME ":" FNR)
e = (e ": badly formed `system' line")
print e > "/dev/stderr"
next
}
$1 = ""
$2 = ""
stat = system($0)
if (stat != 0) {
e = ("extract: " FILENAME ":" FNR)
e = (e ": warning: system returned " stat)
print e > "/dev/stderr"
}
}
/^@c(omment)?[ \t]+file/ {
if (NF != 3) {
e = ("extract: " FILENAME ":" FNR ": badly formed `file' line")
print e > "/dev/stderr"
next
}
if ($3 != curfile) {
if (curfile != "")
close(curfile)
curfile = $3
}
for (;;) {
if ((getline line) <= 0)
unexpected_eof()
if (line ~ /^@c(omment)?[ \t]+endfile/)
break
else if (line ~ /^@(end[ \t]+)?group/)
continue
else if (line ~ /^@c(omment+)?[ \t]+/)
continue
if (index(line, "@") == 0) {
print line > curfile
continue
}
n = split(line, a, "@")
# if a[1] == "", means leading @,
# don't add one back in.
for (i = 2; i <= n; i++) {
if (a[i] == "") { # was an @@
a[i] = "@"
if (a[i+1] == "")
i++
}
}
print join(a, 1, n, SUBSEP) > curfile
}
}
function unexpected_eof()
{
printf("extract: %s:%d: unexpected EOF or error\n",
FILENAME, FNR) > "/dev/stderr"
exit 1
}
END {
if (curfile)
close(curfile)
}
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